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WorksheetsL3 - 7270/7290 - 157 Diagnose - Rectify Engine Faults
Total questions: 11
Worksheet time: 6mins
Which one of the following sensors is shown in the image shown below?
Knock sensor.
Pressure sensor.
Camshaft sensor.
Engine speed sensor.
Using the image shown below, what would occur if number “3” pulse width was extended?
Less fuel injected.
More fuel injected.
Shorter fuel duration.
Longer spark duration.
When testing the exhaust gas of an engine it is found to contain an excessive amount of hydrocarbons. What would be the most likely cause?
A defective spark plug.
A leaking head gasket.
A leaking inlet manifold.
A defective catalytic converter.
Which of the following tools would be used to check the serviceability of an electronic fuel injector?
An ammeter.
An ohmmeter.
A compression tester.
A cylinder leakage tester
On a sequential fuel injection system, the injectors are operated
on the exhaust stroke
by the fuel pump system
on the fuel return sequence
with the engines firing order.
Which engine sensor uses a piezo resistive crystal?
Cam shaft sensor.
Mass air flow sensor.
Engine knock sensor.
Manifold absolute pressure sensor.
A throttle Potentiometer is used to provide information on
speed
position
pressure
temperature.
One advantage of using a multiplexing/CAN system is it
reduces the amount of cable required
reduces the number of ECUs required
increases the amount of cable required
increases the diameter of cable required.
When subjected to heat, a negative temperature coefficient (NTC) sensor's internal resistance will
read infinity at all temperatures
increase as temperature increases
remain constant at all temperatures
decrease as temperature increases.
What conditions are oxides of nitrogen produced in a combustion chamber?
When low octane rating fuel is used.
When excessive fuel pressure is created.
When low combustion temperatures occur.
When high combustion temperatures occur.
Which one of the following components is part of the electronic evaporative emissions control system?
Glow plugs
Charcoal canister
Catalytic converter
Diesel particulate filter
